modelcontextprotocol/go-sdk
Watch
1
0
Fork
You've already forked go-sdk
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 1
go-sdk/internal/readme
History
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Robert Findley 204b59483b
 mcp,design: revert 'content' back to an interface type (#29) 
After some experience with the flattened version of Content, we see that
it can easily lead to incorrect usage and is a harder API to read.
Therefore, this CL changes back to a design similar to what we had prior
to https://go.dev/cl/672415, though opting to promote content
unmarshalling to the protocol types that use it, which leads to an
overall simpler api.
2025-06-25 13:09:05 -04:00
..
client mcp,design: revert 'content' back to an interface type (#29) 2025-06-25 13:09:05 -04:00
server mcp,design: revert 'content' back to an interface type (#29) 2025-06-25 13:09:05 -04:00
build.sh mcp, internal/readme: fix go generate (#6) 2025-06-23 15:46:53 -04:00
Makefile internal/mcp: construct README with weave 2025-05-21 16:21:26 -07:00
README.src.md README: remove toc, update target date 2025-06-23 17:58:00 +00:00

README.src.md

MCP Go SDK

PkgGoDev

This repository contains an implementation of the official Go software development kit (SDK) for the Model Context Protocol (MCP).

WARNING: The SDK is currently unstable and subject to breaking changes. Please test it out and file bug reports or API proposals. The TODO section below outlines outstanding release blockers. We aim to release a stable version of the SDK in August, 2025.

Package documentation

The SDK consists of two importable packages:

Example

In this example, an MCP client communicates with an MCP server running in a sidecar process:

%include client/client.go -

Here's an example of the corresponding server component, which communicates with its client over stdin/stdout:

%include server/server.go -

The examples/ directory contains more example clients and servers.

TODO

The following TODOs block the release of this SDK:

  • Better support for resumability in the Streamable HTTP transport: a server-side event store and client-side retry configuration.
  • OAuth support (or examples of implementing OAuth using middleware).
  • Support for the changes in the 2025-06-18 version of the MCP spec.
  • More examples and documentation.

Design

The design doc for this SDK is at design.md, which was initially reviewed at modelcontextprotocol/discussions/364.

Further design discussion should occur in GitHub issues. See CONTRIBUTING.md for details.

Acknowledgements

Several existing Go MCP SDKs inspired the development and design of this official SDK, notably mcp-go, authored by Ed Zynda. We are grateful to Ed as well as the other contributors to mcp-go, and to authors and contributors of other SDKs such as mcp-golang and go-mcp. Thanks to their work, there is a thriving ecosystem of Go MCP clients and servers.

License

This project is licensed under the MIT License - see the LICENSE file for details.